git.distorted.org.uk Git - u/mdw/putty/blob - raw.c

   1 #include <windows.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4
   5 #include "putty.h"
   6
   7 #ifndef FALSE
   8 #define FALSE 0
   9 #endif
  10 #ifndef TRUE
  11 #define TRUE 1
  12 #endif
  13
  14 static Socket s = NULL;
  15
  16 static void raw_size(void);
  17
  18 static int sb_opt, sb_len;
  19 static char *sb_buf = NULL;
  20 static int sb_size = 0;
  21 #define SB_DELTA 1024
  22
  23 static void c_write (char *buf, int len) {
  24     from_backend(0, buf, len);
  25 }
  26
  27 static int raw_closing (Plug plug, char *error_msg, int error_code, int calling_back) {
  28     sk_close(s);
  29     s = NULL;
  30     if (error_msg) {
  31         /* A socket error has occurred. */
  32         connection_fatal (error_msg);
  33     } /* Otherwise, the remote side closed the connection normally. */
  34     return 0;
  35 }
  36
  37 static int raw_receive (Plug plug, int urgent, char *data, int len) {
  38     c_write(data, len);
  39     return 1;
  40 }
  41
  42 /*
  43  * Called to set up the raw connection.
  44  *
  45  * Returns an error message, or NULL on success.
  46  *
  47  * Also places the canonical host name into `realhost'.
  48  */
  49 static char *raw_init (char *host, int port, char **realhost) {
  50     static struct plug_function_table fn_table = {
  51         raw_closing,
  52         raw_receive
  53     }, *fn_table_ptr = &fn_table;
  54
  55     SockAddr addr;
  56     char *err;
  57
  58     /*
  59      * Try to find host.
  60      */
  61     addr = sk_namelookup(host, realhost);
  62     if ( (err = sk_addr_error(addr)) )
  63         return err;
  64
  65     if (port < 0)
  66         port = 23;                     /* default telnet port */
  67
  68     /*
  69      * Open socket.
  70      */
  71     s = sk_new(addr, port, 0, 1, &fn_table_ptr);
  72     if ( (err = sk_socket_error(s)) )
  73         return err;
  74
  75     sk_addr_free(addr);
  76
  77     return NULL;
  78 }
  79
  80 /*
  81  * Called to send data down the raw connection.
  82  */
  83 static void raw_send (char *buf, int len) {
  84
  85     if (s == NULL)
  86         return;
  87
  88     sk_write(s, buf, len);
  89 }
  90
  91 /*
  92  * Called to set the size of the window
  93  */
  94 static void raw_size(void) {
  95     /* Do nothing! */
  96     return;
  97 }
  98
  99 /*
 100  * Send raw special codes.
 101  */
 102 static void raw_special (Telnet_Special code) {
 103     /* Do nothing! */
 104     return;
 105 }
 106
 107 static Socket raw_socket(void) { return s; }
 108
 109 static int raw_sendok(void) { return 1; }
 110
 111 static int raw_ldisc(int option) {
 112     if (option == LD_EDIT || option == LD_ECHO)
 113         return 1;
 114     return 0;
 115 }
 116
 117 Backend raw_backend = {
 118     raw_init,
 119     raw_send,
 120     raw_size,
 121     raw_special,
 122     raw_socket,
 123     raw_sendok,
 124     raw_ldisc,
 125     1
 126 };